+++ /dev/null
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.log4j.varia;
-
-import java.io.DataInputStream;
-import java.io.DataOutputStream;
-import java.io.IOException;
-import java.io.InterruptedIOException;
-import java.net.ServerSocket;
-import java.net.Socket;
-
-import org.apache.log4j.RollingFileAppender;
-import org.apache.log4j.helpers.LogLog;
-
-/**
- This appender listens on a socket on the port specified by the
- <b>Port</b> property for a "RollOver" message. When such a message
- is received, the underlying log file is rolled over and an
- acknowledgment message is sent back to the process initiating the
- roll over.
-
- <p>This method of triggering roll over has the advantage of being
- operating system independent, fast and reliable.
-
- <p>A simple application {@link Roller} is provided to initiate the
- roll over.
-
- <p>Note that the initiator is not authenticated. Anyone can trigger
- a rollover. In production environments, it is recommended that you
- add some form of protection to prevent undesired rollovers.
-
-
- @author Ceki Gülcü
- @since version 0.9.0 */
-public class ExternallyRolledFileAppender extends RollingFileAppender {
-
- /**
- The string constant sent to initiate a roll over. Current value of
- this string constant is <b>RollOver</b>.
- */
- static final public String ROLL_OVER = "RollOver";
-
- /**
- The string constant sent to acknowledge a roll over. Current value of
- this string constant is <b>OK</b>.
- */
- static final public String OK = "OK";
-
- int port = 0;
- HUP hup;
-
- /**
- The default constructor does nothing but calls its super-class
- constructor. */
- public
- ExternallyRolledFileAppender() {
- }
-
- /**
- The <b>Port</b> [roperty is used for setting the port for
- listening to external roll over messages.
- */
- public
- void setPort(int port) {
- this.port = port;
- }
-
- /**
- Returns value of the <b>Port</b> option.
- */
- public
- int getPort() {
- return port;
- }
-
- /**
- Start listening on the port specified by a preceding call to
- {@link #setPort}. */
- public
- void activateOptions() {
- super.activateOptions();
- if(port != 0) {
- if(hup != null) {
- hup.interrupt();
- }
- hup = new HUP(this, port);
- hup.setDaemon(true);
- hup.start();
- }
- }
-}
-
-
-class HUP extends Thread {
-
- int port;
- ExternallyRolledFileAppender er;
-
- HUP(ExternallyRolledFileAppender er, int port) {
- this.er = er;
- this.port = port;
- }
-
- public
- void run() {
- while(!isInterrupted()) {
- try {
- ServerSocket serverSocket = new ServerSocket(port);
- while(true) {
- Socket socket = serverSocket.accept();
- LogLog.debug("Connected to client at " + socket.getInetAddress());
- new Thread(new HUPNode(socket, er), "ExternallyRolledFileAppender-HUP").start();
- }
- } catch(InterruptedIOException e) {
- Thread.currentThread().interrupt();
- e.printStackTrace();
- } catch(IOException e) {
- e.printStackTrace();
- } catch(RuntimeException e) {
- e.printStackTrace();
- }
- }
- }
-}
-
-class HUPNode implements Runnable {
-
- Socket socket;
- DataInputStream dis;
- DataOutputStream dos;
- ExternallyRolledFileAppender er;
-
- public
- HUPNode(Socket socket, ExternallyRolledFileAppender er) {
- this.socket = socket;
- this.er = er;
- try {
- dis = new DataInputStream(socket.getInputStream());
- dos = new DataOutputStream(socket.getOutputStream());
- } catch(InterruptedIOException e) {
- Thread.currentThread().interrupt();
- e.printStackTrace();
- } catch(IOException e) {
- e.printStackTrace();
- } catch(RuntimeException e) {
- e.printStackTrace();
- }
- }
-
- public void run() {
- try {
- String line = dis.readUTF();
- LogLog.debug("Got external roll over signal.");
- if(ExternallyRolledFileAppender.ROLL_OVER.equals(line)) {
- synchronized(er) {
- er.rollOver();
- }
- dos.writeUTF(ExternallyRolledFileAppender.OK);
- }
- else {
- dos.writeUTF("Expecting [RollOver] string.");
- }
- dos.close();
- } catch(InterruptedIOException e) {
- Thread.currentThread().interrupt();
- LogLog.error("Unexpected exception. Exiting HUPNode.", e);
- } catch(IOException e) {
- LogLog.error("Unexpected exception. Exiting HUPNode.", e);
- } catch(RuntimeException e) {
- LogLog.error("Unexpected exception. Exiting HUPNode.", e);
- }
- }
-}
-
git://source.jalview.org / jalview.git / blobdiff